I have a CalDigit FASTA-6GU3 in my Mac Pro 5,1. I'm using their driver and USB 3.0 transfer is slow and somewhat choppy. I am comparing transfers of 23GB of Canon RAW files from a FW800 reader and a USB 3.0 reader. The FW reader transfers the files in about 6 minutes. The transfer is smooth and steady. The USB reader transfers the files in about 17 minutes. It seems like it transfers in bursts. So, will the Mountain Lion 3.0 drivers override the CalDigit drivers and provide the correct performance for this card?